Mechanism-Based Theories of Strengthening and Hardening for Alloy Design and Processing

基于机制的合金设计和加工强化硬化理论我们计划基于基于机制的应变梯度（MSG）塑性对铝合金的析出相硬化进行系统的研究。将使用单元胞模型来表示铝基体中分散的颗粒。颗粒的大小从十分之一微米到几十微米不等。代表性电池的大小由颗粒大小和体积分数决定。将开发基于MSG塑性有限元方法的计算机程序，以预测在固定体积分数下颗粒尺寸、形状和分布变化时的宏观力学性能。该代码将通过与铝中空洞生长相关的基准分析解决方案进行验证。预测结果将与现有的实验数据进行比较，并通过美国铝业公司的进一步实验进行验证

Mechanism-Based Theories of Strengthening and Hardening for Alloy Design and ProcessingWe plan to conduct a systematic study of precipitate hardening of aluminum alloys based on mechanism-based strain gradient (MSG) plasticity. A unit-cell model will be used to represent dispersed particles in an aluminum matrix. The size of the particle ranges from a tenth of a micron to tens of microns. The size of the representative cell is determined by the particle size and volume fraction. A computer code based on finite element methods for MSG plasticity will be developed to predict macroscopic mechanical properties as particle size, shape and distribution are varied at a fixed volume fraction. This code will be validated by benchmark analytical solutions associated with void growth in aluminum. The predictions will be compared to existing experimental data and tested by further experiments to be conducted in ALCOA.***